Terminal positioning method and apparatus

Abstract

A terminal positioning method is performed by a base station, includes: determining a first latency variation of a feeder link corresponding to a terminal; receiving a second latency variation of a service link reported by the terminal; determining a round-trip latency from the base station to the terminal according to the first latency variation and the second latency variation, and determining a location of the terminal based on the round-trip latency.

1 . A terminal positioning method, performed by a base station, comprising:
 determining a first latency variation of a feeder link corresponding to a terminal;   receiving a second latency variation of a service link reported by the terminal;   determining a round-trip latency from the base station to the terminal according to the first latency variation and the second latency variation, and   determining a location of the terminal based on the round-trip latency.   
     
     
         2 . The method according to  claim 1 , wherein determining the first latency variation of the feeder link corresponding to the terminal comprises:
 determining a transmission latency on the feeder link upon transmitting a downlink reference signal (RS) to the terminal;   determining a reception latency on the feeder link upon receiving an uplink RS transmitted by the terminal;   determining a latency difference between the reception latency and the transmission latency; and   determining the latency difference as the first latency variation of the feeder link corresponding to the terminal.   
     
     
         3 . The method according to  claim 1 , further comprising:
 determining a latency variation sum of the first latency variation and the second latency variation, wherein the latency variation sum is configured for determining the round-trip latency from the base station to the terminal.   
     
     
         4 . The method according to  claim 1 , further comprising:
 sending first configuration information to the terminal, wherein the first configuration information comprises a plurality of preset transmission times for transmitting an uplink reference signal (RS).   
     
     
         5 . The method according to  claim 1 , further comprising:
 sending satellite indication information to the terminal,   wherein the satellite indication information comprises second configuration information of a target satellite, and   wherein the second configuration information comprises information for determining a motion trajectory and a motion velocity of the target satellite.   
     
     
         6 . The method according to  claim 1 , further comprising:
 sending a first indication signaling to the terminal, wherein the first indication signaling indicates an uplink resource for transmitting an uplink reference signal (RS).   
     
     
         7 . The method according to  claim 1 , further comprising:
 sending a second indication signaling to the terminal,   wherein the second indication signaling indicates a correspondence between uplink reference signal (RS) transmission information and second latency variations,   wherein the second indication signaling is a high-layer signaling or a physical layer signaling; and   wherein the uplink RS transmission information comprises one item of:
 time domain resources occupied by an uplink RS transmission; 
 frequency domain resources occupied by the uplink RS transmission; or 
 RS sequences for the uplink RS transmission. 
   
     
     
         8 . A terminal positioning method, performed by a terminal, comprising:
 reporting a latency variation of a service link to a base station, wherein the latency variation is configured for determining a round-trip latency from the base station to the terminal.   
     
     
         9 . The method according to  claim 8 , further comprising:
 determining a time interval between receiving a downlink reference signal (RS) and transmitting an uplink RS;   receiving satellite indication information sent by the base station, wherein the satellite indication information comprises second configuration information of a target satellite, and wherein the second configuration information comprises information for determining a motion trajectory and a motion velocity of the target satellite; and   determining the latency variation according to the satellite indication information and the time interval between receiving the downlink RS and transmitting the uplink RS.   
     
     
         10 . The method according to  claim 9 , wherein determining the time interval between receiving the downlink RS and transmitting the uplink RS comprises:
 obtaining a predefined time interval between receiving the downlink RS and transmitting the uplink RS; or,   determining signal transmission time of the uplink RS among a plurality of preset transmission times based on a signal reception time of the downlink RS, and determining the time interval between receiving the downlink RS and transmitting the uplink RS according to the signal transmission time and the signal reception time.   
     
     
         11 . The method according to  claim 10 , further comprising:
 receiving first configuration information sent by the base station, wherein the first configuration information comprises the plurality of preset transmission times for transmitting the uplink RS.   
     
     
         12 . The method according to  claim 8 , wherein reporting the latency variation of the service link to the base station comprises:
 determining an uplink resource for transmitting an uplink reference signal (RS) according to a first indication signaling sent by the base station; and   reporting the latency variation explicitly to the base station via an uplink channel indicated by the uplink resource, wherein the uplink channel is an uplink control channel or an uplink data channel.   
     
     
         13 . The method according to  claim 12 , further comprising:
 receiving the first indication signaling sent by the base station, wherein the first indication signaling indicates the uplink resource for transmitting the uplink RS.   
     
     
         14 . The method according to  claim 8 , wherein reporting the latency variation of the service link to the base station comprises:
 determining a correspondence between uplink reference signal (RS) transmission information and second latency variations;   determining a piece of uplink RS transmission information according to the correspondence between uplink RS transmission information and latency variations; and   reporting the latency variation implicitly to the base station on a basis of the piece of uplink RS transmission information.   
     
     
         15 . The method according to  claim 14 , wherein determining the correspondence between uplink RS transmission information and latency variations comprises:
 determining the correspondence between uplink RS transmission information and latency variations from a protocol configuration; or   receiving a second indication signaling sent by the base station, wherein the second indication signaling indicates the correspondence between uplink RS transmission information and latency variations, and wherein the second indication signaling is a high-layer signaling or a physical layer signaling;   wherein the uplink RS transmission information comprises one item of:
 time domain resources occupied by an uplink RS transmission; 
 frequency domain resources occupied by the uplink RS transmission; or 
 RS sequences for the uplink RS transmission. 
   
     
     
         16 . The method according to  claim 14 , wherein reporting the latency variation implicitly to the base station on the basis of the piece of uplink RS transmission information comprises:
 reporting the latency variation implicitly to the base station by using the piece of uplink RS transmission information to transmit the uplink RS to the base station.   
     
     
         17 . (canceled) 
     
     
         18 . (canceled) 
     
     
         19 . A communication device, comprising:
 one or more transceivers;   one or more memories; and   one or more processors connected to the one or more transceivers and the one or more memories separately,   wherein the one or more processors are configured to:   determine a first latency variation of a feeder link corresponding to a terminal;   receive a second latency variation of a service link reported by the terminal:   determine a round-trip latency from the communication device to the terminal according to the first latency variation and the second latency variation; and   determine a location of the terminal based on the round-trip latency.   
     
     
         20 . A non-transitory computer storage medium storing computer-executable instructions that, when executed by one or more processors, cause the one or more processors to perform the method according to  claim 1 . 
     
     
         21 . (canceled) 
     
     
         22 . A communication device, comprising:
 one or more transceivers;   one or more memories; and   one or more processors connected to the one or more transceivers and the one or more memories separately,   wherein the one or more processors are configured to perform the method according to  claim 8 .   
     
     
         23 . A non-transitory computer storage medium storing computer-executable instructions that, when executed by one or more processors, cause the one or more processors to perform the method according to  claim 8 .